[Issue 20034] New: [Reg 2.087.0] hashOf of a non-scalar enum doesn't compile

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20034

          Issue ID: 20034
           Summary: [Reg 2.087.0] hashOf of a non-scalar enum doesn't
                    compile
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: regression
          Priority: P1
         Component: druntime
          Assignee: nobody at puremagic.com
          Reporter: radu.racariu at gmail.com

The following:
```
import std.stdio;

enum Algo
{
    a = "foo",
    b = "bar",
    c = "baz"
}

void main()
{
        writeln(hashOf(Algo.a, 1));
}
```

Produces an error:
/dlang/dmd/linux/bin64/../../src/druntime/import/core/internal/hash.d(135):
Error: undefined identifier e_val, did you mean variable val?
onlineapp.d(14): Error: template instance `core.internal.hash.hashOf!(Algo)`
error instantiating

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